CAN SOMEONE PLEASE HELP ME!!!!!

Answer:

15

Step-by-step explanation:

x - y = 10, then x = 10 + y

x + y = 20

substitute for x:

10 + y + y = 20

2y = 10

y = 5

x = 10 + 5 = 15

Answer:

x=-4

Step-by-step explanation:

Answer:

x + 2y = -2

Step-by-step explanation:

Well let's examine the relation between x and y in a perpendicular line.

We can use the fact that for a line Ax + By = C, any line with equation Bx + (-A)y = D is perpendicular (swapping A and B gives a mirror image with respect to the line x=y and changing one of the signs gives a mirror image with respect to axis x or y. Those two together give a perpendicular line).

So we're looking for a line with equation x + 2y = D

We know what it passes through the point (6, -4), so let's input it into the equation x + 2y = D

6 + 2*(-4) = D

6 - 8 = D

D = -2

So the equation is x + 2y = -2

note that 2x + 4y = -4

or any other multiple also works.

Answer:

I believe the answer will be 50+100n dollars

Step-by-step explanation:

n is the number of cavities so however many cavities there is, it gets multiplied by 100, in this case, it is 100*n which is 100n. So your final cost would be 50+100n dollars.

Answer:

value of tan θ = 1

Step-by-step explanation:

To find θ do the asin of 1/√2

θ = asin (1/√2)

θ = asin (0.707106781)

θ = 45

and then to find tan θ, do tan 45

tan 45 = 1

Answer:

C i think

Step-by-step explanation:

you do 13x90 then divide by 5x

Answer: x=12

Step-by-step explanation:

We will use the Pythagorean Theorem since we know two sides and it is a right triangle

Pythagorean Theorem is a^2+b^2=c^2

a=5,b=x, c=13

(5)^2+(x)^2=(13)^2

25+(x)^2=169

Subtract 25 from both sides to start solving for x

(x)^2=144

Take the square root of both sides and get x=12

x=12

Answer:

D- 30 square units

Step-by-step explanation:

5 times 12 =60

60/2= 30

Answer:

£ 4.20

Step-by-step explanation:

1 kg= £1.20

3.5 kg = £1.20*3.5

=£ 4.20

The cost of the apples being weighed on the scales would be £ 4.20

The unitary method is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value.

Multiplication is the mathematical operation that is used to determine the product of two or more numbers.

We are given that Apples are sold in a supermarket at £1.20 per gram.

Therefore, we know that

1 kg= £1.20

For 3.5 kg

= £1.20 x 3.5

=£ 4.20

The cost of the apples is £ 4.20

Learn more about the unitary method, please visit the link given below;

https://brainly.com/question/23423168

#SPJ2

Answer:

Hi There!

Step-by-step explanation:

Your Answers Are:

Its hard to work w/o a ruler or a protractor, so these might be incorrect.

If this helps, though, please give me a thanks!! ^^

- abakugosimp

Answer:

The formula for the equation of a circle is (x – h)2+ (y – k)2 = r2, where (h, k) represents the coordinates of the center of the circle, and r represents the radius of the circle.

i also provided with a chart i dont know if it will help

Answer:

This would be area because you are trying to find the total area that the sprinkler water touched and not the perimeter(circumference) of it

Hope this helps :)

Answer:

Step-by-step explanation:

cos(∠X) = adj./hyp.

arccos(adj./hyp.) = ∠X

arccos(13/18) = 43.761...≈ 43°

Answer:

V=πr^2h=π·8^2·6≈1206.37158

Step-by-step explanation:

Answer:

4/9

Step-by-step explanation:

(2/3)^2

(2/3) x (2/3)

2 x 2 is 4

3 x 3 is 9

4/9

Answer:

Simple interest after 2 year = $36

Step-by-step explanation:

Given:

Amount invested = $300

Number of year amount invested = 2 year

Rate of interest per year = 6% = 6/100 = 0.06

Find:

Simple interest after 2 year

Computation:

Simple interest formula;

Simple interest = [Amount invested][Rate of interest][Number of year]

Simple interest after 2 year = [300][0.06][2]

Simple interest after 2 year = [18][2]

Simple interest after 2 year = $36

Answer:

Step-by-step explanation:

General knowledge to apply with similar questions

If the scale factor is k, then:

Answer:

27

Step-by-step explanation:

(6×3)+(3×3)=27

18. 9.

Answer:

150cm²

Step-by-step explanation:

the equation is 6a² where a is the length of the edge

Answer:

150cm²

Step-by-step explanation:

If the side length of the cube is 5 then you take 5² to get the surface area of one of the face which is 25. Since a cube has 6 sides just 25×6 which is 150.

Answer:

a. 121

b.2

Step-by-step explanation:

a.

33/3×11>11

11×11>11

121>11

b.

5×2/8<5

10/8<5

1.25<5

Answer:

148

Step-by-step explanation:

3p + 85 +2p -10 =180

5p+75=180

5p=105

p=21

3p+85

3(21)+85=148

Answer:

Answer: $11,942.29

Step-by-step explanation:

Let the value after 9 years be y

y = 22400 (0.9325)^9

y = 11,942.29Step-by-step explanation:

Answer:

A

Step-by-step explanation:

Answer:

c

Step-by-step explanation:

log2-log 6=log(2/6)=log (1/3)

log(2) + log(1/6)

log(1/3)

Answer:

C

Step-by-step explanation:

porque sarabtiene más puntos que Bernie

Answer:

A=210in^2

Step-by-step explanation:

A=b1+b2/2h

A=(15+20)/2(12)

A=35/2(12)

A=17.5(12)

A=210 in^2

Answer:

295.68

Step-by-step explanation:

Answer:

The answer is C

Step-by-step explanation:

Hope it helps:)))

Can i have brainy plzzz

Answer:

x^2 + 8x + 7 and x(x + 8) + 7

Step-by-step explanation

Answer:

Step-by-step explanation:

25x = 300

Rearrange to solve

x = 300 divided by 25 = 12

Hope this helps